Datasheet LTC1923 (Analog Devices) - 5

LTC1923
W U TYPICAL PERFOR A CE CHARACTERISTICS Oscillator Frequency vs Temperature Oscillator Frequency vs RT VREF vs Temperature
265 1800 2.510 V C DD = 2.7V, 5V T = 330pF 1600 T R A = 25°C T = 10k 245 1400 2.505 1200 225 CT = 68pF 2.500 1000 (V) CT = 150pF 800 REFV 205 2.495 600 400 OSCILLATOR FREQUENCY (kHz) 185 OSCILLATOR FREQUENCY (kHz) 2.490 200 CT = 330pF 165 0 2.485 –50 –20 10 40 70 100 130 5 10 15 20 –50 –20 10 40 70 100 130 TEMPERATURE (°C) RT (kΩ) TEMPERATURE (°C) 1923 G01 1923 G02 1923 G03
VREF vs IREF for Different Temperatures Output Dead Time vs RT Output Rise/Fall Time vs RSLEW
2.515 150 250 TA = 25°C TA = 25°C 2.510 2.505 125 200 TA = 125°C V 2.500 DD = 2.7V 100 150 2.495 (V) V T DD = 5V A = 25°C REFV 2.490 75 100 2.485 DEAD TIME (ns) RISE TIME (ns) 2.480 T 50 50 A = –50°C 2.475 2.470 25 0 0 5 10 15 5 7.5 10 12.5 15 0 100 200 300 IREF (mA) RT (kΩ) RSLEW (kΩ) 1923 G04 1923 G05 1923 G06
Error Amplifier Offset Voltage Open Thermistor Threshold Shorted Thermistor Threshold vs Temperature vs Temperature vs Temperature
1.5 4.60 1.00 VSET = 5V VSET = 5V 1.0 4.59 0.99 (mV) IO 0.5 4.58 0.98 0 4.57 0.97 ERROR AMPLIFIER V –0.5 4.56 0.96 OPEN THERMISTOR THRESHOLD (V) SHORTED THERMISTOR THRESHOLD (V) –1.0 4.55 0.95 –50 –20 10 40 70 100 130 –50 –20 10 40 70 100 130 –50 –20 10 40 70 100 130 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 1923 G07 1923 G08 1923 G09 1923f 5